40402243 has 4 divisors (see below), whose sum is σ = 46174000. Its totient is φ = 34630488.

The previous prime is 40402177. The next prime is 40402253. The reversal of 40402243 is 34220404.

40402243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40402243 - 2¹⁷ = 40271171 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40402243.

It is not an unprimeable number, because it can be changed into a prime (40402253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2885868 + ... + 2885881.

It is an arithmetic number, because the mean of its divisors is an integer number (11543500).

Almost surely, 2^40402243 is an apocalyptic number.

40402243 is a deficient number, since it is larger than the sum of its proper divisors (5771757).

40402243 is an equidigital number, since it uses as much as digits as its factorization.

40402243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5771756.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 40402243 is about 6356.2758750702. The cubic root of 40402243 is about 343.1377444025.

Adding to 40402243 its reverse (34220404), we get a palindrome (74622647).

The spelling of 40402243 in words is "forty million, four hundred two thousand, two hundred forty-three".